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Gulhane A, Soriano B, Stanescu L, Schauer J, Ferguson M, Romberg E, Bhutta S, Otto R, Caris E, Mallenahalli S, Portman M, Litt H, Buddhe S. Objective Comparison of Clinical and Cardiac Magnetic Resonance Biomarkers in Adolescents Presenting With Acute Chest Pain and Elevated Troponins Pre-COVID and Post-COVID Vaccination. J Magn Reson Imaging 2024; 59:1867-1873. [PMID: 37622988 DOI: 10.1002/jmri.28971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/26/2023] Open
Affiliation(s)
- Avanti Gulhane
- Department of Cardiothoracic Radiology, University of Washington, Seattle, Washington, USA
| | - Brian Soriano
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Luana Stanescu
- Department of Pediatric Radiology, University of Washington, Seattle, Washington, USA
| | - Jenna Schauer
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Mark Ferguson
- Department of Pediatric Radiology, University of Washington, Seattle, Washington, USA
| | - Erin Romberg
- Department of Radiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Sadaf Bhutta
- Department of Pediatric Radiology, University of Washington, Seattle, Washington, USA
| | - Randolph Otto
- Department of Radiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Elizabeth Caris
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Sathish Mallenahalli
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Michael Portman
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
| | - Harold Litt
- Department of Radiology, Perelman School of Medicine of the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sujatha Buddhe
- Department of Pediatric Cardiology, Seattle Children's Hospital, University of Washington, Seattle, Washington, USA
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Daneshgaran G, Lu GN, Otto R, Susarla SM. Spontaneous Regeneration of the Ramus-Condyle Unit Following Severe Avulsion Injury in a Child. Facial Plast Surg Aesthet Med 2023. [PMID: 38016289 DOI: 10.1089/fpsam.2023.0265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023] Open
Affiliation(s)
- Giulia Daneshgaran
- Division of Plastic Surgery, Department of Surgery, University of Washington, Seattle, Washington, USA
| | - G Nina Lu
- Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, USA
| | - Randolph Otto
- Department of Radiology, University of Washington, Seattle, Washington, USA
| | - Srinivas M Susarla
- Division of Plastic Surgery, Department of Surgery, University of Washington, Seattle, Washington, USA
- Craniofacial Center, Seattle Children's Hospital, Seattle, Washington, USA
- Department of Oral and Maxillofacial Surgery, University of Washington, Seattle, Washington, USA
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Otto R, Schirrmeister W, Walcher F, Drynda S. Length of Stay – ein guter
Qualitätsindikator? Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Drynda S, Otto R, Schirrmeister W, Walcher F. ENQuIRE- Evaluation von Qualitätsindikatoren in der
Notaufnahme – Ergebnisse und lessons learned. Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Schmid L, Otto R, Walcher F, Drynda S. Patienteneinwilligung in der Notaufnahme – Ist ein
Selektionsbias vermeidbar? Das Gesundheitswesen 2022. [DOI: 10.1055/s-0042-1753932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Brammen D, Greiner F, Kulla M, Otto R, Schirrmeister W, Thun S, Drösler SE, Pollmanns J, Semler SC, Lefering R, Thiemann VS, Majeed RW, Heitmann KU, Röhrig R, Walcher F. [AKTIN - The German Emergency Department Data Registry - real-time data from emergency medicine : Implementation and first results from 15 emergency departments with focus on Federal Joint Committee's guidelines on acuity assessment]. Med Klin Intensivmed Notfmed 2020; 117:24-33. [PMID: 33346852 PMCID: PMC7750913 DOI: 10.1007/s00063-020-00764-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/03/2020] [Accepted: 10/20/2020] [Indexed: 12/02/2022]
Abstract
Hintergrund Die Notfallversorgung befindet sich im Umbruch. In Notaufnahmen werden Patienten ausgehend von Symptomen und Dringlichkeit versorgt; dies bildet sich jedoch in den etablierten Routinedaten der gesetzlichen Sozialversicherung nicht ab. Ziel des AKTIN-Projekts war der Aufbau einer datenschutzkonformen Registerinfrastruktur zur Nutzung von klinischen Routinedaten aus Notaufnahmen. Methoden Über eine standardisierte Schnittstelle werden aus den verschiedenen Dokumentationssystemen kontinuierlich Daten der Notaufnahmebehandlung in ein lokales Data Warehouse exportiert. Dort stehen sie sowohl für lokale Nutzungen, wie interne Berichte und Qualitätsmanagement, als auch gleichzeitig datenschutzkonform für multizentrische Auswertungen zur Verfügung. Anhand der Registerpopulation wird die Ersteinschätzung sowie die Erhebung von Vitalparametern in Abhängigkeit von Vorstellungsgründen für einen 12-Monats-Zeitraum analysiert. Ergebnisse Für den Zeitraum 04/2018 bis 03/2019 wurden 436.149 gültige Fälle aus 15 Notaufnahmen übermittelt. In 86,0 % der Fälle ist eine Ersteinschätzung dokumentiert. Diese fand in 70,5 % innerhalb von 10 min nach Ankunft des Patienten statt. In 10 Kliniken wird regelhaft (82,3 %) ein Vorstellungsgrund erfasst. Die Erfassung von Vitalparametern variiert plausibel zwischen den Vorstellungsgründen. Schlussfolgerung Das AKTIN-Notaufnahmeregister bietet einen zeitnahen Einblick in das Versorgungsgeschehen der Notaufnahmen ohne zusätzlichen Dokumentationsaufwand und unabhängig vom primären IT-System, Kostenträger, Fallart und Abrechnungsmodus. Die Vorgaben des Gemeinsamen Bundesausschusses zur Ersteinschätzung werden weitgehend umgesetzt. Durch die Etablierung von standardisierten Vorstellungsgründen werden symptombasierte Analysen und Gesundheitssurveillance ermöglicht. Zusatzmaterial online Die Onlineversion dieses Beitrags (10.1007/s00063-020-00764-2) enthält die Abb. S1 und S2. Beitrag und Zusatzmaterial stehen Ihnen auf www.springermedizin.de zur Verfügung. Bitte geben Sie dort den Beitragstitel in die Suche ein, das Zusatzmaterial finden Sie beim Beitrag unter „Ergänzende Inhalte“. ![]()
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Affiliation(s)
- D Brammen
- Universitätsklinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland.
- Universitätsklinik für Anästhesiologie und Intensivtherapie, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland.
| | - F Greiner
- Universitätsklinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
| | - M Kulla
- Klinik für Anästhesiologie, Intensivmedizin, Notfallmedizin und Schmerztherapie, Bundeswehrkrankenhaus Ulm, Ulm, Deutschland
| | - R Otto
- Universitätsklinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
| | - W Schirrmeister
- Universitätsklinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
| | - S Thun
- Competence Center eHealth, Hochschule Niederrhein, Krefeld, Deutschland
| | - S E Drösler
- Fachbereich Gesundheitswesen, Hochschule Niederrhein, Krefeld, Deutschland
| | - J Pollmanns
- Fachbereich Gesundheitswesen, Hochschule Niederrhein, Krefeld, Deutschland
| | - S C Semler
- TMF - Technologie- und Methodenplattform für die vernetzte medizinische Forschung e. V., Berlin, Deutschland
| | - R Lefering
- Institut für Forschung in der Operativen Medizin (IFOM), Universität Witten/Herdecke, Köln, Deutschland
| | - V S Thiemann
- Abteilung Medizinische Informatik, Carl von Ossietzky Universität Oldenburg, Oldenburg, Deutschland
| | - R W Majeed
- Institut für Medizinische Informatik, Medizinische Fakultät, RWTH Aachen, Aachen, Deutschland
| | - K U Heitmann
- Heitmann Consulting and Services, Hürth, Deutschland
- hih - health innovation hub, Bundesministerium für Gesundheit, Berlin, Deutschland
| | - R Röhrig
- Institut für Medizinische Informatik, Medizinische Fakultät, RWTH Aachen, Aachen, Deutschland
| | - F Walcher
- Universitätsklinik für Unfallchirurgie, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland
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Otto R, Verloove F. Nuevos xenófitos de La Palma (Islas Canarias, España), con énfasis en las especies naturalizadas y (potencialmente) invasoras. Parte 3. collectbot 2020. [DOI: 10.3989/collectbot.2020.v39.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Varios meses de trabajos de campo en La Palma (Islas Canarias occidentales) han posibilitado el descubrimiento de nuevas plantas vasculares no nativas. Alstroemeria aurea, A. ligtu, Anacyclus radiatus subsp. Radiatus, Chenopodium album subsp. borbasii, Cotyledon orbiculata, Cucurbita ficifolia, Cynodon nlemfuensis, Datura stramonium subsp. tatula, Digitaria ciliaris var. rhachiseta, D. ischaemum, Diplotaxis tenuifolia, Egeria densa, Eugenia uniflora, Galinsoga quadriradiata, Glebionis segetum, Kalanchoe laetivirens, Lemna minuta, Ligustrum lucidum, Lotus broussonetii, Oenothera fallax, Paspalum notatum, Passiflora caerulea, P. manicata × tarminiana, P. tarminiana, Pelargonium capitatum, Phaseolus lunatus, Portulaca trituberculata, Pyracantha angustifolia, Sedum mexicanum, Trifolium lappaceum, Urochloa mutica, U. subquadripara y Volutaria tubuliflora son xenófitos naturalizados o (potencialmente) invasores o de especial interés florístico, que se citan por primera vez para las Islas Canarias o para la isla de La Palma. Tres táxones adicionales, probablemente casuales, se dan a conocer por primera vez de las Islas Canarias, y siete táxones de la isla de La Palma.
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Sahm M, Otto R, Pross M, Scholbach T, Mantke R. Laparoscopic therapy of the coeliac artery compression syndrome: a critical analysis of the current standard procedure. Ann R Coll Surg Engl 2020; 102:104-109. [PMID: 31508996 PMCID: PMC6996427 DOI: 10.1308/rcsann.2019.0121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2019] [Indexed: 01/15/2023] Open
Abstract
INTRODUCTION Median arcuate ligament syndrome has been known anatomically for approximately 100 years and results from a compression of the coeliac axis by fibrous attachment of the diaphragmatic crura. Owing to the rarity of the disease and limited available data, many aspects of treatment are controversial. Currently, laparoscopic decompression is considered by several authors as standard surgical procedure. We present an analysis of the clinical routine of MALS therapy. METHODS We conducted a prospective observational trial in patients with MALS between March 2016 and August 2018, in which clinical symptoms, diagnostic evaluation, procedures with complication analysis and follow-up data were recorded. RESULTS A total of 18 patients (12 female, 6 male) with MALS, aged between 15 and 65 years, were included in this study. All patients presented with long-standing abdominal pain. Preoperative Doppler ultrasonography showed a flow velocity of the coeliac artery averaging 289.9cm/second in mid-position of the diaphragm, 285.9cm/second in expiration and 199.0cm/second in inspiration. All operated patients underwent laparoscopic decompression; two patients received an angiographic intervention. Postoperatively, a significant decrease of the flow velocity in mid-position of the diaphragm was detected (P = 0.018). At follow-up after 5.2 months, 50.0% of the patients were pain-free, 37.5% reported symptomatic relief and 12.5% showed evidence for a recurrence. CONCLUSION MALS is challenging both diagnostically and therapeutically. Laparoscopy with release of the median arcuate ligament is an essential part of the therapy and can be confirmed by Doppler ultrasonography. Disease outcome is also influenced by several predictive factors.
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Affiliation(s)
- M Sahm
- Brandenburg Medical School, Department of Surgery, University Hospital, Brandenburg/Havel, Brandenburg, Germany
- Department of Surgery, DRK Kliniken Berlin Köpenick, Berlin, Germany
| | - R Otto
- Institute for Quality Control in Operative Medicine, Otto-von-Guericke-University, Magdeburg, Germany
| | - M Pross
- Department of Surgery, DRK Kliniken Berlin Köpenick, Berlin, Germany
| | - T Scholbach
- Department of Radiology, Ultrasonic Practice Leipzig, Leipzig, Germany
| | - R Mantke
- Brandenburg Medical School, Department of Surgery, University Hospital, Brandenburg/Havel, Brandenburg, Germany
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Katzenstein J, Steinert R, Ptok H, Otto R, Gastinger I, Lippert H, Meyer F. [Gender-specific differences of the early postoperative and oncosurgical long-term outcome in rectal cancer-data obtained in a prospective multicenter observational study]. Chirurg 2019; 89:458-465. [PMID: 29644427 DOI: 10.1007/s00104-018-0634-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Gender-specific aspects have been increasingly considered in clinical medicine, also in oncological surgery. AIM To analyze gender-specific differences of early postoperative and oncological outcomes after rectal cancer resection based on data obtained in a prospective multicenter observational study. PATIENTS AND METHODS As part of the multicenter prospective observational study "Quality assurance in primary rectal cancer", data on tumor site, exogenic and endogenic risk factors, neoadjuvant treatment, surgical procedures, tumor stage, intraoperative and postoperative complications of patients with the histological diagnosis of rectal cancer were registered. Data from the years 2005-2006 and 2010-2011 were investigated with respect to gender-specific differences of postoperative morbidity, hospital mortality, local recurrency rate, disease-free and overall survival by univariable and multivariable analyses. RESULTS Overall, data from 10,657 patients were evaluated: 60.9% of the patients were male, who were significantly younger (p < 0.001). Men had a significantly higher rate of alcohol (p < 0.001) and nicotine abuse (p < 0.001) as well as a trend to a higher body mass index (BMI) compared with women. Although, there was no significant difference in the distribution of various tumor stages comparing men and women, neoadjuvant radiochemotherapy was used significantly more often in male patients (p < 0.001). In addition, male patients underwent an abdominoperineal rectum exstirpation more often, whereas creation of an enterostoma and Hartmann's procedure were more frequently used in women (p < 0.001 each). Multivariate analysis revealed that male patients developed a higher overall morbidity (odds ratio, OR: 1.5; p < 0.001) during both study periods and from 2010-2011 a higher hospital mortality (OR: 1.8; p < 0.001). After a median follow-up period of 36 months, gender did not have a significant impact on overall survival, disease-free survival or on the local tumor recurrency. The 5‑year overall survival was 60.5%, disease-free survival 63.8% and local recurrency rate was 5%. CONCLUSION Independent of other variables, gender differences were found with respect to early postoperative outcome but not to oncological long-term results after surgery of rectal cancer.
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Affiliation(s)
- J Katzenstein
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
- Klinik für Allgemein- und Viszeralchirurgie, AMEOS-Klinikum Aschersleben, Aschersleben, Deutschland
| | - R Steinert
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
- Klinik für Allgemein- und Viszeralchirurgie, St Josefs Hospital Salzkotten, Salzkotten, Deutschland
| | - H Ptok
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
- Klinik für Allgemein- und Viszeralchirurgie, St Josefs Hospital Salzkotten, Salzkotten, Deutschland
| | - R Otto
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
| | - I Gastinger
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
| | - H Lippert
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland
| | - F Meyer
- AN-Institut für Qualitätssicherung, Otto-von-Guericke-Universität, Magdeburg, Deutschland.
- Klinik für Allgemein‑, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A.ö.R., Leipziger Straße 44, 39120, Magdeburg, Deutschland.
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Sahm M, Otto R, Pross M, Mantke R. Minimally invasive video-assisted thyroidectomy: a critical analysis of long-term cosmetic results using a validated tool. Ann R Coll Surg Engl 2019; 101:180-185. [PMID: 30322290 PMCID: PMC6400915 DOI: 10.1308/rcsann.2018.0178] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2018] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Since its first publication in 1997, minimally invasive video-assisted thyroidectomy (MIVAT) has developed into the predominant minimally invasive surgery of the thyroid. A major advantage over conventional thyroid surgery is the superior cosmetic result. However, there are still few data comparing the long-term cosmetic results of the two methods. This paper compares the long-term cosmetic results of the two methods, based on follow-up assessments. METHODS Between 2004 and 2011, 143 preselected patients underwent a MIVAT in our department. Additionally, 134 patients underwent a conventional thyroidectomy in our hospital in 2011. A total of 117 patients from the MIVAT group and 102 patients from the conventional thyroidectomy group received follow-up assessments after 23.1 and 23.6 months, respectively, using the patient and observer scar assessment scale. RESULTS The measurable cervical scar length averaged 1.9 cm in the MIVAT group and 3.9 cm in the conventional group (P < 0.001). Some 11.1% of the patients in the MIVAT group and 7.1% of the patients in the conventional group had developed keloid (P = 0.391). The patient scar assessment score was 10.4 for the MIVAT group compared with 9.9 for the conventional thyroidectomy group (P = 0.691) and the observer scare assessment score was 8.6 for MIVAT compared with 9.9 for conventional thyroidectomy (P = 0.011). CONCLUSION In the patient assessment instrument, conventional thyroidectomy had a small advantage over MIVAT in the cosmetic long-term results. This difference between the two groups was, however, not significant. Our result contradicts short-term cosmetic results of published randomized studies with improvement for MIVAT. The Observer Score demonstrates a significant advantage of the MIVAT.
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Affiliation(s)
- M Sahm
- Brandenburg Medical School, Department of Surgery, University Hospital, Brandenburg/Havel, Brandenburg, Germany
| | - R Otto
- Institute for Quality Control in Operative Medicine, Otto-von-Guericke-University, Magdeburg, Germany
| | - M Pross
- Department of Surgery, DRK Kliniken Berlin Köpenick, Berlin, Germany
| | - R Mantke
- Brandenburg Medical School, Department of Surgery, University Hospital, Brandenburg/Havel, Brandenburg, Germany
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Vollherbst DF, Otto R, Hantz M, Ulfert C, Kauczor HU, Bendszus M, Sommer CM, Möhlenbruch MA. Investigation of a New Version of the Liquid Embolic Agent PHIL with Extra-Low-Viscosity in an Endovascular Embolization Model. AJNR Am J Neuroradiol 2018; 39:1696-1702. [PMID: 30093480 DOI: 10.3174/ajnr.a5750] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 06/12/2018] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND PURPOSE The type and composition of an embolic agent have a relevant influence on the performance of endovascular embolization. The aim of this study was to investigate a new version of the liquid embolic agent precipitating hydrophobic injectable liquid (PHIL) with extra-low-viscosity in an in vivo embolization model. MATERIALS AND METHODS Twenty-four embolization procedures were performed in the porcine rete mirabile. Eight embolizations were performed with PHIL 25% low viscosity, Squid 12, and standard PHIL 25%, respectively. Procedure time, required volume of embolic agent, visibility of the embolic agent, embolization control, embolization extent (ie, penetration of the rete mirabile), amount of reflux, and degree of embolization distal to the rete mirabile were assessed. RESULTS All embolic agents were adequately visible. The embolization extent was not significantly different among the 3 investigated agents; however, there was a tendency toward a higher embolization extent for PHIL 25% low viscosity (median embolization extent: 88% [PHIL 25% low viscosity]; 65% [Squid 12]; 60% [PHIL 25%]; P = .146). The amount of reflux was significantly lower for the extra-low-viscosity agents PHIL 25% low viscosity and Squid 12 compared with the standard PHIL 25% (median reflux distance: 8 mm [PHIL 25% low viscosity]; 6 mm [Squid 12]; 17 mm [PHIL 25%]; P = .011). All other embolization features did not differ among agents. CONCLUSIONS PHIL 25% low viscosity is a promising liquid embolic agent for endovascular embolization, featuring effective distal penetration, adequate visibility, a low amount of reflux, and good flow control.
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Affiliation(s)
- D F Vollherbst
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
- Clinic for Diagnostic and Interventional Radiology (D.F.V., H.U.K., C.M.S.), Heidelberg University Hospital, Heidelberg, Germany
| | - R Otto
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
| | - M Hantz
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
| | - C Ulfert
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
| | - H U Kauczor
- Clinic for Diagnostic and Interventional Radiology (D.F.V., H.U.K., C.M.S.), Heidelberg University Hospital, Heidelberg, Germany
| | - M Bendszus
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
| | - C M Sommer
- Clinic for Diagnostic and Interventional Radiology (D.F.V., H.U.K., C.M.S.), Heidelberg University Hospital, Heidelberg, Germany
- Clinic for Diagnostic and Interventional Radiology (C.M.S.), Klinikum Stuttgart, Stuttgart, Germany
| | - M A Möhlenbruch
- From the Department of Neuroradiology (D.F.V., R.O., M.H., C.U., M.B., M.A.M.)
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Otto R, Verloove F. Nuevos xenófitos de La Palma (Islas Canarias, España), con énfasis en las especies naturalizadas y (potencialmente) invasoras. Parte 2. Collect Bot 2018. [DOI: 10.3989/collectbot.2018.v37.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Varios meses de trabajos de campo en La Palma (Islas Canarias occidentales) han posibilitado el descubrimiento de nuevas plantas vasculares no nativas. Abutilon theophrasti, Agrostis xfouilladeana, Alternanthera brasiliana, Bupleurum salicifolium subsp. salicifolium, Callisia fragrans, Emilia coccinea, Hyparrhenia sinaica, Ipomoea purpurea, Jasminum polyanthum, Macfadyena unguis-cati, Malvastrum coromandelianum subsp. coromandelianum, Misopates calycinum, Nephrolepis cordifolia, Opuntia microdasys, Passiflora subpeltata, Plantago lanceolata, Polygonum aviculare subsp. rurivagum, Pseudogynoxys chenopodioides, Psidium littorale, Robinia pseudoacacia, Rosa micrantha, Rumex bucephalophorus subsp. gallicus, Sorghum bicolor subsp. verticilliflorum, Sphagneticola trilobata, Syzygium jambos, Thunbergia alata y Youngia japonica subsp. japonica son xenófitos naturalizados o (potencialmente) invasores, se citan por primera vez para las Islas Canarias o para La Palma. Se dan a conocer por primera vez 14 t·axones adicionales, probablemente casuales, de las Islas Canarias y 15 taxones de la isla de La Palma.
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Ngo AV, Done S, Otto R, Friedman S, Stanescu AL. Nasoduodenal tube placement: Are two views necessary to confirm position? Pediatr Radiol 2017; 47:1302-1311. [PMID: 28567656 DOI: 10.1007/s00247-017-3870-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 03/14/2017] [Accepted: 04/19/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Nasoduodenal tube (NDT) placement is typically performed at the bedside and two-view abdominal radiographs are usually used to confirm tube position. Anecdotally, in most instances the lateral view is unnecessary and utilizes more than twice the radiation than an anteroposterior (AP) view alone. OBJECTIVE We hypothesize that NDT location can be determined using only the AP view, with the NDT position determined on two views utilized as the gold standard. MATERIALS AND METHODS A search was performed for all two- or three-view abdominal radiographs from September 2012 to September 2013 with the phrase "ND tube" in the reason field of the requisition. These studies were independently reviewed by two radiologists and scored for anatomical tube position in three different scenarios: AP view alone, the lateral view alone, and both views together, with the latter serving as the gold standard. The anatomical scores were subsequently grouped to reflect clinically significant scenarios. Comparative analysis was performed with the original and clinically grouped scores. RESULTS A total of 102 patients and 306 separate two-view exams were evaluated. Of the 102 patients, 55 had at least two separate exams. Across raters, concordances of AP and lateral scores relative to the gold standard assessment were 88% and 73% for anatomical scores, and 91.5% and 86.4% for clinically grouped data. Trend differences for fewer errors were found with the AP compared to the lateral view. There were statistically significant group differences with a greater number of false-negative errors in the lateral data set. No clear differences were found when comparing AP and lateral ratings for false-positive errors. Upon review of the common errors, we determined a few imaging findings on AP radiographs that can help assess the need for an additional lateral view. CONCLUSION A single AP view is sufficient to determine the NDT position in most cases. Two views should be reserved for cases where the NDT position cannot be definitively assessed. Transitioning toward the single AP view to evaluate the NDT position could have immediate consequences for dose reduction.
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Affiliation(s)
- Anh-Vu Ngo
- Department of Radiology, Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA.
| | - Stephen Done
- Department of Radiology, Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA
| | - Randolph Otto
- Department of Radiology, Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA
| | - Seth Friedman
- Department of Radiology, Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA
| | - A Luana Stanescu
- Department of Radiology, Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA
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Klinghammer K, Otto R, Raguse J, Albers A, Fichtner I, Keilholz U, Hoffmann J. Molecular subtypes of head and neck cancer predict response to cetuximab treatment. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32744-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Krueger S, Goldbach T, Meyer F, Steinert R, Wolff S, Otto R, Gastinger I, Lippert H. 10 Jahre Kolonkarzinomchirurgie – unizentrische frühpostoperative und onkochirurgische Langzeit-Ergebnisse. Zentralbl Chir 2016. [DOI: 10.1055/s-0036-1586332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Otto R, Verloove F. Nuevos xenófitos de La Palma (Islas Canarias, España), con énfasis en las especies naturalizadas y (potencialmente) invasoras. Collect Bot 2016. [DOI: 10.3989/collectbot.2016.v35.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Varios años de trabajos de campo en La Palma (Islas Canarias occidentales) han posibilitado el descubrimiento de nuevas plantas vasculares no nativas. Amaranthus blitoides, A. deflexus, Aptenia cordifolia, Argemone ochroleuca, Begonia schmidtiana, Capsella rubella, Cardamine hamiltonii, Centratherum punctatum, Cerastium fontanum subsp. vulgare, Chasmanthe floribunda (ampliamente confundida con C. aethiopica y Crocosmia xcrocosmiiflora en Macaronesia), Chenopodium probstii, Commelina latifolia var. latifolia, Dichondra micrantha, Dysphania anthelmintica, Epilobium ciliatum, Erigeron sumatrensis, Erodium neuradifolium, Eucalyptus globulus, Euphorbia hypericifolia, E. maculata, Gamochaeta antillana, Geranium pyrenaicum, Hedychium coronarium, Hypochaeris radicata, Kalanchoe daigremontiana, K. delagoensis, K. xhoughtonii, Kickxia commutata subsp. graeca, K. spuria subsp. integrifolia, Lactuca viminea subsp. ramosissima, Landoltia punctata, Malvastrum coromandelianum subsp. capitatospicatum, Oenothera jamesii, Orobanche nana, Oxalis latifolia, Papaver hybridum, P. setigerum, Pilea microphylla, Podranea ricasoliana, Polygonum arenastrum, Portulaca granulatostellulata, P. nicaraguensis, P. nitida, P. papillatostellulata, Rumex crispus subsp. crispus, R. pulcher subsp. pulcher, R. xpratensis, Sechium edule, Sida spinosa var. angustifolia, Silene nocturna, Solanum abutiloides, S. alatum, S. decipiens, Sonchus tenerrimus, Spergularia marina, Stellaria pallida, Tragopogon porrifolius subsp. australis, Tribulus terrestris y Trifolium repens subsp. repens son xenófitos naturalizados o (potencialmente) invasores, que se citan por primera vez para las Islas Canarias o para la isla de La Palma. 37 táxones adicionales, probablemente casuales, se dan a conocer por primera vez de las Islas Canarias, y 56 táxones de la isla de La Palma.
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Bacaro G, Maccherini S, Chiarucci A, Jentsch A, Rocchini D, Torri D, Gioria M, Tordoni E, Martellos S, Altobelli A, Otto R, Escudero CG, Fernández-Lugo S, Fernández-Palacios JM, Arévalo JR. Distributional patterns of endemic, native and alien species along a roadside elevation gradient in Tenerife, Canary Islands. COMMUNITY ECOL 2015. [DOI: 10.1556/168.2015.16.2.10] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Purcell PL, Shinn J, Davis GE, Otto R, Parikh SR. Nasoseptal Flap Reconstruction of Pediatric Sellar Defects: A Radiographic Feasibility Study. Otolaryngol Head Neck Surg 2014. [DOI: 10.1177/0194599814541627a297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Objectives: Computed tomography (CT) measurements were used to investigate the feasibility of performing vascularized nasoseptal flap reconstruction of sellar defects in children. Methods: Ten CT scans from children of each year of age from birth to 18 were obtained for 190 total subjects. Patients with incomplete pneumatization were excluded from analysis. Measurements of nasoseptal flap and sellar defect length were obtained for each subject using OSIRIX radiology software. Reconstruction was presumed feasible if the ratio of nasoseptal flap length to associated sellar defect length was greater than 1. Results: Of the 190 CT studies, 125 displayed complete pneumatization. Of these, 120 (96%) displayed a ratio of nasoseptal flap length to sellar defect length greater than 1, suggesting feasibility of flap reconstruction. Mean ratio of nasoseptal flap length to sellar defect length for all subjects was 1.47 (SD = 0.33) with 95% CI [1.41, 1.53]. Only 5 patients (4%) had inadequate nasoseptal flaps; mean age for these patients was 14.8 years (SD = 2.9), which is older than mean age of 11.6 years (SD = 4) for subjects with adequate measurements. The mean age difference did not meet significance with t-test ( P = .069), likely due to the small number of patients with inadequate flaps. An inverse relationship was identified between age and ratio of nasoseptal flap length to sellar defect length (Pearson correlation coefficient –0.49). Conclusions: Flap length is not a limiting factor in nasoseptal flap reconstruction of sellar defects in children. Younger patients have higher ratios of nasoseptal flap length to sellar defect length than older patients.
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Steinert R, Depel M, Schmidt A, Ptok H, Meyer F, Wolff S, Otto R, Gastinger I. [Iatrogenic splenic injuries in surgery of colorectal carcinoma: impact on the oncological long-term of outcome]. Chirurg 2014; 85:812-7. [PMID: 24519612 DOI: 10.1007/s00104-013-2697-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Iatrogenic lesions of the spleen during surgery of colorectal carcinoma is considered a significant risk factor for a worse early postoperative outcome. With regard to the impact of iatrogenic splenic lesions particularly associated with splenectomy on the oncological long-term outcome, only limited valid data are available. METHODS Data obtained in a prospective multicenter observational study were analyzed. The study enrolled 45,265 patients with surgery for colorectal carcinoma in curative and palliative intentions during the study period from 01 January 2000 to 31 December 2004, with regard to the impact of iatrogenic splenic lesions on survival rates. RESULTS AND CONCLUSION Follow-up data with corresponding informed consent were obtained from 564 patients with iatrogenic splenic lesions, resulting in a follow-up rate of 99.8 %. The median follow-up period was 50.2 months. The median 5-year overall survival was 4.8 years in group I (splenic lesion with splenectomy) and in group II (splenic lesion with organ preservation) 8.0 years (p = 0.009). Between group II (splenic lesion with organ preservation) and group III (control group with no splenic lesion) there were no significant differences with regard to long-term survival. Using multivariate Cox regression analysis, iatrogenic splenic lesions with splenectomy were identified as an independent risk factor for a worse oncological long-term outcome.
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Affiliation(s)
- R Steinert
- An-Institut für Qualitätssicherung in der operativen Medizin gGmbH an der Otto-von-Guericke-Universität, Leipziger Str. 44, 39120, Magdeburg, Deutschland
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Steinert R, Gastinger I, Ridwelski K, Ptok H, Wolff S, Meyer F, Otto R, Lippert H. [Surgical treatment of carcinomas of the oesophagogastric junction - results achieved in multicentre studies]. Zentralbl Chir 2013; 138:403-9. [PMID: 23950077 DOI: 10.1055/s-0033-1350712] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Adenocarcinomas of the oesophagogastric junction are increasingly being considered as a separated tumour entity. The prognosis is rather poorer compared with that for distal gastric cancer. Data from a multicentre study as part of research on clinical care aim to reflect the current situation in surgical treatment after inauguration of neoadjuvant modalities. PATIENTS AND METHOD As part of the ongoing prospective multicentre observational study QCGC 2 (German Gastric Cancer Study 2), 544 adenocarcinomas of the oesophagogastric junction (AEG 1-3) were registered from 01/01/2007 to 12/31/2009. RESULTS Patients underwent surgical intervention in 108 (76.6 %) of the 141 surgical departments which provided data to the study. In 391 patients (82.5 %), R0 resection was achieved. Almost 60 % of the carcinomas of the oesophagogastric junction were approached in departments with no more than 10 of these tumour lesions through the whole study period (3 years). Endoscopic ultrasonography was performed in 283 cases (53 %); the rate of neoadjuvant treatment was 34.4 % (n = 187). Intraoperative fresh frozen section was only included in intraoperative decision-making in 242 patients (60.8 %). In the revealed heterogeneous spectrum of surgical interventions, a limited number of transthoracic approaches (20 %) and a mediastinal lymphadenectomy rate of only 47 % were found. Hospital lethality was 6.6 %. In the adenocarcinomas of the oesophagogastric junction, a significantly lower median survival (25 months) compared with distal gastric cancer (38 months) was observed depending on the tumour stage. In addition, 5-year survival rate of AEG patients (33.1 %) was distinctly lower than for patients with distal gastric cancer (41.4 %). There was no significantly better survival by neoadjuvant treatment in the group of investigated patients. CONCLUSION The results in the treatment of carcinomas of the oesophagogastric junction in the multicentre setting including surgical departments of each profile and region even after introduction of multimodal therapeutic concepts are not satisfying. In particular, modern diagnostic and surgical strategies need to be widely used or their percentage has to be increased. In this context, centralisation of the surgical care of this specific tumour entity appears reasonable.
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Affiliation(s)
- R Steinert
- AN-Institut für Qualitätssicherung in der operativen Medizin, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland
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Otto R, Brox J, Trippel S, Stei M, Best T, Wester R. Exit Channel Dynamics in a Micro-Hydrated SN2 Reaction of the Hydroxyl Anion. J Phys Chem A 2013; 117:8139-44. [DOI: 10.1021/jp401347p] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- R. Otto
- Institut für
Ionenphysik
und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - J. Brox
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße
3, 79104 Freiburg, Germany
| | - S. Trippel
- Center for Free-Electron Laser
Science, DESY, Notke-Straße 85, 22706
Hamburg, Germany
| | - M. Stei
- Institut für
Ionenphysik
und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - T. Best
- Institut für
Ionenphysik
und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
| | - R. Wester
- Institut für
Ionenphysik
und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
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Baker L, Friedman S, Borson S, Barsness S, Craft S, Merriam G, Otto R, Novotny E, Vitiello M. P4‐259: Growth hormone‐releasing hormone administration in mild cognitive impairment and healthy aging increases inhibitory neurotransmitter activity in brain as measured by MR spectroscopy. Alzheimers Dement 2012. [DOI: 10.1016/j.jalz.2013.08.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laura Baker
- University of Washington School of MedicineSeattleWashingtonUnited States
| | - Seth Friedman
- Seattle Children's HospitalSeattleWashingtonUnited States
| | - Soo Borson
- University of WashingtonSeattleWashingtonUnited States
| | - Suzanne Barsness
- University of Washington School of MedicineSeattleWashingtonUnited States
| | - Suzanne Craft
- VA Puget Sound Health Care SystemSeattleWashingtonUnited States
| | - George Merriam
- VA Puget Sound Health Care SystemTacomaWashingtonUnited States
| | - Randolph Otto
- Seattle Children's HospitalSeattleWashingtonUnited States
| | - Edward Novotny
- Seattle Childrens' HospitalSeattleWashingtonUnited States
| | - Michael Vitiello
- University of Washington School of MedicineSeattleWashingtonUnited States
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Otto R, Brox J, Trippel S, Stei M, Best T, Wester R. Single solvent molecules can affect the dynamics of substitution reactions. Nat Chem 2012; 4:534-8. [DOI: 10.1038/nchem.1362] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 04/23/2012] [Indexed: 11/10/2022]
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Otto R, Xie J, Brox J, Trippel S, Stei M, Best T, Siebert MR, Hase WL, Wester R. Reaction dynamics of temperature-variable anion water clusters studied with crossed beams and by direct dynamics. Faraday Discuss 2012; 157:41-57; discussion 113-40. [DOI: 10.1039/c2fd20013a] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Otto R, Ferguson MR, Marro K, Grinstead JW, Friedman SD. Limitations of using logarithmic transformation and linear fitting to estimate relaxation rates in iron-loaded liver. Pediatr Radiol 2011; 41:1259-65. [PMID: 21607600 DOI: 10.1007/s00247-011-2082-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 02/15/2011] [Accepted: 03/14/2011] [Indexed: 12/01/2022]
Abstract
BACKGROUND MRI is being increasingly used to evaluate tissue relaxation in the setting of iron overload. Diagnostic accuracy is strongly dependent upon the acquisition and analysis methods employed. Typically, a multi-echo train of relaxation data is acquired, the resulting curve is fit using a non-linear (exponential) function, and the derived relaxation time is converted to iron concentration by a calibration formula derived from paired MRI-biopsy samples. A theoretically valid processing alternative is to fit a straight line to the relaxation data after logarithmic transformation (log-linear). This log-linear method is more computationally efficient, allowing a full relaxation map to be generated in near real time. This method is present on all scanner platforms and has been published for use in assessing iron concentration. These factors imply methodological validity. OBJECTIVE To use in vivo and simulation data to show that log-linear fitting can generate highly erroneous relaxation results in iron-loaded tissues. MATERIALS AND METHODS After IRB approval, exponential and linear fitting were compared in a cohort of 20 patients being evaluated for hepatic iron overload. Simulation analyses were performed to characterize the main factors impacting derived results. RESULTS In human subjects, log-linear analyses demonstrated gross deviation from exponential results at a moderate relaxation shortening (T2* ~5 ms). Simulation analyses demonstrated that the discrepancy was caused by noise effects and additional signal components violating mono-exponential function shape. CONCLUSION Log-linear processing results in increasingly erroneous estimation of T2* with iron-loading. Therefore, this method should not be employed for measurement of relaxation behavior in clinical samples.
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Affiliation(s)
- Randolph Otto
- Department of Radiology, Seattle Children's Hospital, 4800 Sandpoint Way, Room R4488, Seattle, WA 98105, USA
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Trippel S, Stei M, Eichhorn C, Otto R, Hlavenka P, Weidemüller M, Wester R. Nanosecond photofragment imaging of adiabatic molecular alignment. J Chem Phys 2011; 134:104306. [DOI: 10.1063/1.3557822] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Marro K, Otto R, Kolokythas O, Shimamura A, Sanders JE, McDonald GB, Friedman SD. A simulation-based comparison of two methods for determining relaxation rates from relaxometry images. Magn Reson Imaging 2011; 29:497-506. [PMID: 21333480 DOI: 10.1016/j.mri.2010.11.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2010] [Revised: 09/27/2010] [Accepted: 11/28/2010] [Indexed: 10/18/2022]
Abstract
When assessing liver iron content using relaxometry, an average relaxation rate (R1, R2 or R2*) is usually determined from a region of interest or the entire liver. This is commonly performed by fitting the signal decay in individual voxels to an appropriate relaxation function. The voxel-level parameters resulting from the fits are combined to determine the average relaxation rate, and an empirically derived calibration curve is used to convert this single value to iron content. The goal of this study was to compare the precision and accuracy of this voxel-wise fitting to an alternative method that relies on first averaging the signals from all voxels within the region of interest and then determining the relaxation rate from a single fit. Systematic differences were observed when both methods were applied to clinical images. Mathematical simulations were employed to determine which method provided more robust estimates of the true relaxation rate. The mathematical simulations were then expanded to include a range of conditions expected in typical relaxometry images. The results show that voxel-wise fitting skews the relaxation rate estimates and increases variance, particularly when the true relaxation rate is moderate to fast, as it would be in liver with high iron content. The potential impact of these results on clinical decisions is discussed.
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Affiliation(s)
- Kenneth Marro
- Department of Radiology, Seattle Children's Hospital, Seattle, WA, USA.
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Otto R, de Vos WM, Gavrieli J. Plasmid DNA in Streptococcus cremoris Wg2: Influence of pH on Selection in Chemostats of a Variant Lacking a Protease Plasmid. Appl Environ Microbiol 2010; 43:1272-7. [PMID: 16346027 PMCID: PMC244226 DOI: 10.1128/aem.43.6.1272-1277.1982] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cleared lysates of a proteolytic (Prt) strain and a naturally occurring non-proteolytic (Prt) variant of Streptococcus cremoris Wg2 contain equal amounts of covalently closed circular plasmid DNA. An analysis of this plasmid DNA by agarose gel electrophoresis revealed the presence of at least five different plasmid species in the Prt strain and only three plasmid species in the Prt variant. Curing studies with acriflavine indicated that a 16-megadalton plasmid determined proteolytic activity in the Prt strain. In energy-limited chemostats inoculated with both strains it was observed that the Prt strain was replaced by the Prt variant. This effect was most apparent when the pH of the culture was fixed at a value above 6.3. No selection for the Prt variant was observed at pH 5.9. Since the two types of organisms contain equal amounts of plasmid DNA, it was concluded that the energy gain of the Prt variants at pH values above 6.0 probably has to be found in protein synthesis rather than in plasmid DNA synthesis.
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Affiliation(s)
- R Otto
- Department of Microbiology, University of Groningen, 9751 NN Haren, The Netherlands
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Trippel S, Stei M, Otto R, Hlavenka P, Mikosch J, Eichhorn C, Lourderaj U, Zhang JX, Hase WL, Weidemüller M, Wester R. Kinematically complete chemical reaction dynamics. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/194/1/012046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Otto R. Ureterbeteiligung an einer Leistenhernie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1229244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Otto R, Flückiger A, Candardjis G. Indikationen zur Darstellung der oberen Hohlvene und ihrer Hauptäste. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1229468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Penzel T, Conradt R, Resch T, Otto R, Peter J. EIN EINFACHER EINMALTEST FÜR DIE OBSTRUKTIVE SCHLAFAPNOE. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.2000.45.s1.443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Otto R. Ueber Immunitätsreaktionen mit dem Bazillus Weil-Felix und über seine ätiologische Bedeutung für das Fleckfieber. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1134649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Otto R. Ueber den Gehalt des Blutes an Diphtherie-Antitoxin bei gesunden Erwachsenen, Rekonvaleszenten und Bazillenträgern, nebst Bemerkungen über die Bedeutung der letzteren bei der Diphtherie. Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0029-1190258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hlavenka P, Otto R, Trippel S, Mikosch J, Weidemüller M, Wester R. Absolute photodetachment cross section measurements of the O− and OH− anion. J Chem Phys 2009; 130:061105. [PMID: 19222260 DOI: 10.1063/1.3080809] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- P Hlavenka
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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Otto R, Mullan Y, Gerstein H. The effect of partial meal replacement therapy on weight loss and glycaemic control in obese individuals with type 2 diabetes. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33216-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mikosch J, Otto R, Trippel S, Eichhorn C, Weidemüller M, Wester R. Inverse temperature dependent lifetimes of transient S(N)2 ion-dipole complexes. J Phys Chem A 2008; 112:10448-52. [PMID: 18821740 DOI: 10.1021/jp804655k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The association and collisional stabilization of the S(N)2 entrance channel complex [Cl(-)...CH3Cl]* is studied in a low-temperature radiofrequency ion trap. The temperature dependence of the ternary rate coefficient is measured and a much stronger inverse temperature dependence than expected from a simple statistical calculation is found. From these data the lifetime of the transient S(N)2 complex has been derived as a function of temperature. It is suggested that the inverse temperature dependent rates of nonsymmetric S(N)2 reactions are related to the observed inverse temperature dependence of the transient ion-dipole complexes.
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Affiliation(s)
- J Mikosch
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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Otto R, Mikosch J, Trippel S, Weidemüller M, Wester R. Nonstandard behavior of a negative ion reaction at very low temperatures. Phys Rev Lett 2008; 101:063201. [PMID: 18764452 DOI: 10.1103/physrevlett.101.063201] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2008] [Indexed: 05/26/2023]
Abstract
We have studied the negative ion reaction NH2-+H_{2}-->NH_{3}+H- in the temperature range from 300 to 8 K. We observe a strongly suppressed probability for proton transfer at room temperature. With decreasing temperature, this probability increases, in accordance with a longer lifetime of an intermediate anion-neutral complex. At low temperatures, a maximum in the reaction rate coefficient is observed that suggests the presence of a very small barrier at long range or a quantum mechanical resonance feature.
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Affiliation(s)
- R Otto
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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Mikosch J, Trippel S, Eichhorn C, Otto R, Lourderaj U, Zhang JX, Hase WL, Weidemuller M, Wester R. Imaging Nucleophilic Substitution Dynamics. Science 2008; 319:183-6. [DOI: 10.1126/science.1150238] [Citation(s) in RCA: 279] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Mikosch J, Trippel S, Otto R, Eichhorn C, Hlavenka P, Weidemüller M, Wester R. Kinematically complete reaction dynamics of slow ions. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/88/1/012025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Michel SCA, Löw R, Singer G, Otto R, Hohl M, Kubik RA. [Stereotactic Mammotome breast biopsy: routine clinical experience and correlation with BI-RADS--classification and histopathology]. Praxis (Bern 1994) 2007; 96:1459-1474. [PMID: 17966279 DOI: 10.1024/1661-8157.96.39.1459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND Stereotactic breast biopsy using the Mammotome system allows minimal invasive tissue sampling of suspicious lesions of the breast cancer, e.g. clustered microcalcifications BI-RADS type 3 and 4, and has widely replaced open surgical biopsies. The aim of this retrospective study was to review the results of these biopsies in regard of technical feasibility and complications as well as to correlate initial BI-RADS assessment with histopathology. METHODS One hundred thirty-five vacuum-assisted breast biopsies in 124 patients were evaluated. Before biopsy, the mammograms were classified according to the Breast Imaging Reporting and Data System (BI-RADS). All mammograms were reviewed with knowledge of the final histologic diagnosis. Patients with benign diagnoses underwent mammographic follow-up. Excisional biopsy was recommended for diagnoses of in-situ or invasive carcinoma. RESULTS No serious complications of the biopsies were observed. Histopathology revealed 105 (78%) benign lesions. Benign lesions were classified as BI-RADS 3 in 49 (36%) and as suspicious (BI-RADS 4) in 56 (41%). Thirty lesions (22%) were malignant, of which 26 (87%) were classified BI-RADS 4 or 5. The frequency of malignancy in BI-RADS 4 and 5 was 19 of 75 (25%) and 7 of 7 (100%), respectively. Of the 53 BI-RADS 3 lesions, 4 (8%) were malignant. CONCLUSIONS Mammotome biopsy was shown to be a safe and well-tolerated technique for the work-up of mammographic lesions. The frequency of malignant histopathologic findings in BI-RADS 3 lesions was higher than expected, reflecting the difficulties in the mammographic differentiation of benign and malignant clustered microcalcifications.
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Affiliation(s)
- S C A Michel
- Institut für Radiologie, Kantonsspital Baden AG.
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Trippel S, Mikosch J, Berhane R, Otto R, Weidemüller M, Wester R. Photodetachment of cold OH- in a multipole ion trap. Phys Rev Lett 2006; 97:193003. [PMID: 17155622 DOI: 10.1103/physrevlett.97.193003] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2006] [Indexed: 05/12/2023]
Abstract
The absolute photodetachment cross section of OH- anions at a rotational and translational temperature of 170 K is determined by measuring the detachment-induced decay rate of the anions in a multipole radio-frequency ion trap. In comparison with previous results, the obtained cross section shows the importance of the initial rotational-state distribution. Using a tomography scan of the photodetachment laser through the trapped ion cloud, the derived cross section is model-independent and thus features a small systematic uncertainty. The tomography also yields the column density of the OH- anions in the 22-pole ion trap in good agreement with the expected trapping potential of a large field free region bound by steep potential walls.
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Affiliation(s)
- S Trippel
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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Abstract
Peak-finding procedures and the geometric phase method of quantitative high resolution electron microscopy (qHRTEM) were applied to determine the local strain and the chemical composition of nanostructured semiconductor materials. The growth of the structures investigated was induced by minimization of strain energy. The analysis of strain distribution is necessary for the understanding of the self-organized formation of nanostructures. The possibilities and limitations of the methods are discussed in detail by analysing HRTEM images of (Si,Ge) islands and of a double layer of stacked quantum dots of (In,Ga)As and Ga(Sb,As).
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Affiliation(s)
- W Neumann
- Institute of Physics, Humboldt University of Berlin, Berlin, Germany.
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